As shown in the screenshot, we now include reasoning messages from the model in the TUI under the heading "codex reasoning":  To ensure these are visible by default when using `o4-mini`, this also changes the default value for `summary` (formerly `generate_summary`, which is deprecated in favor of `summary` according to the docs) from unset to `"auto"`.
codex-core
This crate implements the business logic for Codex. It is designed to be used by the various Codex UIs written in Rust.
Though for non-Rust UIs, we are also working to define a protocol for talking to Codex. See:
You can use the proto subcommand using the executable in the cli crate to speak the protocol using newline-delimited-JSON over stdin/stdout.